If there is no email address associated with an account, it's impossible to use the password recovery feature.
To facilitate student activation next September, make sure that your students have registered their email addresses in their accounts.
How can I check if my students have added their email address?
Simply go to the MANAGE CLASSES menu in the navigation bar in your teacher account.
There, select your group and you will see a list of your students. For each student, you will have the following information:
If your student has an email address registered in their account, it will appear in the column labeled Email.
If this is not the case, you can ask your student to enter their email address in the My ACCOUNT menu in their profile or you can also select the blue pen on the right of the usage column and add an email address to the student's account yourself.